Consider this case of a form vacillating between a name and an act. שָלִיחַ = של-היא-ח from the biblical root שלח $ALAX, 'send', is 'emissary, envoy, courier, delivery person', from which we have nowadays מֵרוֹץ שְׁלִיחִים , 'relay race', שְׁלִיחַ צִבּוּר , 'prayer leader', and דוֹאַר שליחים , 'mess...

Note that לָבוּשׁ = לב-הוּא-שׁ LABU$ is an act, הוּא being the person so dressed, for example as in 1Sam 17:5 וְכוֹבַע נְחֹשֶׁת עַל רֹאשׁוֹ וְשִׁרְיוֹן קַשְׂקַשִּׂים הוּא לָבוּשׁ KJV: "And he had an helmet of brass upon his head, and he was armed with a coat of mail" But, לְבוּשׁ = לב-הוּא...